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handle: 10261/86593 , 11441/78869
[ES]: Se presenta un sistema de medida de humedad del suelo para aplicaciones en el control de riegos. Basado en la medida de las componentes real e imaginaria de la impedancia presentada por el volumen de suelo comprendido entre dos electrodos, permite determinar de forma fiable el contenido de humedad incluso en suelos salinos. Se está desarrollando un ASIC que actúa como interfase entre una sonda capacitiva y un microcontrolador y se han completado las pruebas de laboratorio sobre un primer prototipo. El sistema será empleado como medidor de humedad de suelo para regadíos, al objeto de decidir el momento y volumen de agua óptimo a emplear en cada turno de riego, minimizando así el consumo de agua.
ÈN]: This paper presents a low-cost system to measure soil humidity for application in irrigation control. It is based in the simultaneous measurement of the real and imaginary parts of the impedance of a volume of soil comprised between two conducting electrodes. The separation of real and imaginary parts allows for an accurate measurement of water contents even in soils with high salinity. An ASIC is being developed which acts as interface between a capacitive probe and a microcontroller. Satisfactory laboratory tests have been completed on a first prototype. The system will be used to reduce the water consumption in agriculture by determining the optimum volume of water to use.
Este trabajo ha sido parcialmente financiado por el Programa Nacional de Tecnologías de Información y las Comunicaciones, con cargo a los fondos para Fomento de la I+D y la Innovación en las Regiones Objetivo 1 y 2 del Fondo Europeo para el Desarrollo Regional (FEDER).
Comunicación presentada al "IWS'2001" celebrada en Montevideo (Uruguay) del 21 al 23 de Marzo de 2001.-- et al.
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